241,000 is the answer. To round to the nearest thousand you would look at the value behind which is the hundreds column. You either round up or down, in this case the hundreds digit is 3. If the number is 0,1,2,3,4 you would round down which means it would be 241,000.
If the number was 5,6,7,8,9, you would round up which means your answer would be 242,000.